<?php
// +--------------------------------------------------------------------------+
// | Image_Graph aka GraPHPite                                                |
// +--------------------------------------------------------------------------+
// | Copyright (C) 2003, 2004 Jesper Veggerby Hansen                          |
// | Email         pear.nosey@veggerby.dk                                |
// | Web           http://graphpite.sourceforge.net                           |
// | PEAR          http://pear.php.net/pepr/pepr-proposal-show.php?id=145     |
// +--------------------------------------------------------------------------+
// | This library is free software; you can redistribute it and/or            |
// | modify it under the terms of the GNU Lesser General Public               |
// | License as published by the Free Software Foundation; either             |
// | version 2.1 of the License, or (at your option) any later version.       |
// |                                                                          |
// | This library is distributed in the hope that it will be useful,          |
// | but WITHOUT ANY WARRANTY; without even the implied warranty of           |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        |
// | Lesser General Public License for more details.                          |
// |                                                                          |
// | You should have received a copy of the GNU Lesser General Public         |
// | License along with this library; if not, write to the Free Software      |
// | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA |
// +--------------------------------------------------------------------------+

/**
 * Image_Graph aka GraPHPite - PEAR PHP OO Graph Rendering Utility.
 * @package dataset
 * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
 * @license http://www.gnu.org/licenses/lgpl.txt GNU Lesser General Public License
 * @author Jesper Veggerby Hansen <pear.nosey@veggerby.dk>
 * @version $Id: Sequential.php,v 1.5 2004/11/05 19:13:30 nosey Exp $
 */ 

/**
 * Include file Graph/Dataset/Trivial.php
 */
require_once(IMAGE_GRAPH_PATH . "/Graph/Dataset/Trivial.php");

/**
 * Sequential data set, simply add points (y) 1 by 1.
 * This is a single point dataset, all points are of the type (0, y1), (1, y2), (2, y3)...
 * Where the X-value is implicitly incremented. This is useful for example for barcharts,
 * where you could fx. use an {@see Image_Graph_Dataset_Array} datapreprocessor to make sence of the x-values.
 */
class Image_Graph_Dataset_Sequential extends Image_Graph_Dataset_Trivial 
{

    /**
     * Image_Graph_SequentialDataset [Constructor]
     */
    function &Image_Graph_Dataset_Sequential($dataArray = false)
    {
        parent::Image_Graph_Dataset_Trivial();
        if (is_array($dataArray)) {
            reset($dataArray);
            while (list($id, $value) = each($dataArray)) {
                $this->addPoint($value);
            }
        }
    }

    /**
     * Add a point to the dataset
     * @param int $y The Y value to add, can be omited
     * @param var $ID The ID of the point
	 */
    function addPoint($y, $ID = false)
    {
        parent::addPoint($this->count(), $y);
    }

    /**
     * Gets a X point from the dataset
     * @param var $x The variable to return an X value from, fx in a vector function data set
     * @return var The X value of the variable
     * @access private
     */
    function _getPointX($x)
    {
        return ((int) $x);
    }

    /**
     * The minimum X value
     * @return var The minimum X value
     */
    function minimumX()
    {
        return 0;
    }

    /**
     * The maximum X value
     * @return var The maximum X value
	 */
    function maximumX()
    {
        return $this->count();
    }

}

?>